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Contents
# frozen_string_literal: true
module RuboCop
module Cop
module Rails
# This cop looks for duplicate values in enum declarations.
#
# @example
# # bad
# enum status: { active: 0, archived: 0 }
#
# # good
# enum status: { active: 0, archived: 1 }
#
# # bad
# enum status: [:active, :archived, :active]
#
# # good
# enum status: [:active, :archived]
class EnumUniqueness < Cop
include Duplication
MSG = 'Duplicate value `%<value>s` found in `%<enum>s` ' \
'enum declaration.'.freeze
def_node_matcher :enum_declaration, <<-PATTERN
(send nil? :enum (hash (pair (_ $_) ${array hash})))
PATTERN
def on_send(node)
enum_declaration(node) do |name, args|
items = args.values
return unless duplicates?(items)
consecutive_duplicates(items).each do |item|
add_offense(item, message: format(MSG, value: item.source,
enum: name))
end
end
end
end
end
end
end
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